Method of removing sodium thiosulfate from a hydrosulfite reacti

Details Method of removing sodium thiosulfate from a hydrosulfite reacti Method of removing sodium thiosulfate from a hydrosulfite reacti

1974-09-25

1976-06-01

Vertiz, Oscar R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

210 37R, 260542, 423182, 423514, 423515, C01B 1764

Patent

active

039610349

ABSTRACT:
Filtrate from a formate-sodium hydrosulfite preparation contains valuable amounts of sodium formate and sodium bisulfite, which are raw materials for the synthesis of sodium hydrosulfite. The filtrate also contains sodium thiosulfate which is a known catalyst for the decomposition of sodium hydrosulfite and, therefore, must not be introduced in with the raw materials. Accordingly the method concerns removing the sodium thiosulfate by means of ion exchange with a resin and directing the valuable sodium bisulfite and sodium formate effluent including methanol and water to a distillation column.

REFERENCES:
patent: 2559529 (1951-07-01), Bauman
patent: 3186940 (1965-06-01), Vajna
patent: 3397142 (1968-08-01), Guth et al.
patent: 3420773 (1969-01-01), Selmeszi
patent: 3466139 (1969-09-01), Mihara et al.
patent: 3585127 (1971-06-01), Salem
patent: 3711401 (1973-01-01), Hamilton et al.
patent: 3718732 (1973-02-01), Winslow, Jr. et al.
patent: 3842002 (1974-10-01), Boari
Seamster et al., "Ion Exchange Becomes Powerful Processing Tool", Chemical Engineering, Aug. 22, 1960, pp. 115-120.
Skoog et al., Fundamentals of Analytical Chemistry, pp. 760-763, Holt, Rinehart, and Winston Co., copyright 1963.

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